TM 55-1930-209-14&P-19
Table 2-4. Preventive Maintenance Checks and Services for Seawater System (Continued)
B -
Before
D -
Daily
Q - Quarterly
D -
During
W -
Weekly
S - Semiannually
A -
After
M -
Monthly
A - Annually
INTERVAL
ITEM
PROCEDURES
EQUIPMENT
ITEM
TO BE
CHECK FOR AND HAVE
IS NOT READY/
NO.
INSPECTED
REPAIRED OR ADJUSTED
AVAILABLE IF
B D A D W M Q S A
AS NECESSARY
Dirty Water Operations
Drain filter 15 seconds per each hour
of operation.
1) Drain seawater filters by:
Seawater
Open seawater
Filter No.
Valve No.
1
22 and 26
2
23 and 26
1 and 2
22, 23 and 26
2) After draining, dose valves SW22
and/or 23, and SW26.
3) Record time/date of purging in opera-
tions log.
6
*
*
Cooling Pump
a. While supplying seawater to air condi-
tioning unit and/or chlorinating system
using cooling pump (void 2 port) perform
the following:
1) Check for normal operation and leaks.
Class III leaks.
2) Check cooling water strainer input
Gauges
and output pressure gauges for
inoperable.
normal operation.
* Pressure differences between the
two reading gauges is normal.
* If pressure difference between the
two gauges reaches 2 HG, turn
handle on the cooling water strainer
to route the seawater flow through
dean strainer basket.
* Remove and clean dirty strainer
basket.
* Record date/time of strainer basket
change in operation log.
3) When regulator outlet pressure gauge
drops 10 psi, replace in-line filters.
4) Inspect mounting bolts.
Change 1 2-14
